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BODY BUILDER INSTRUCTIONS Mack Trucks BODY BUILDER INSTRUCTIONS Mack Trucks Electrical Wiring and Connections MD Section 3 Introduction This information provides design and function, specification and procedure details for Electrical Wiring and Connections for MACK vehicles. Note: For information on transmission PTO installation and wiring see Section 9 PTO Installation. Note: For information on PTO parameter programming see Section 9 PTO Parameter Programming. Unless stated otherwise, following a recommendation listed in this manual does not automatically guarantee compliance with applicable government regulations. Compliance with applicable government regulations is your responsibility as the party making the additions/modifications. Please be advised that the Mack Trucks, Inc. vehicle warranty does not apply to any MACK vehicle that has been modified in any way, which in MACK's judgment might affect the vehicles stability or reliability. Contents • “ISO 26262 Functional Safety Manual”, page 2 • “Abbreviations”, page 3 • “General Wiring Definitions”, page 4 • “Routing and Clipping Guidelines”, page 5 • “Electrical Wiring and Connections”, page 16 • “Wiring J1939”, page 27 • “Data Link System”, page 32 • “Road Speed Signal”, page 36 Mack Body Builder Instructions MD USA151882123 Date 8.2020 Page 1 (36) All Rights Reserved ISO 26262 Functional Safety Manual Scope This section describes the functional safety aspects related to the interface between the vehicle and the body builder equipment. Introduction ISO 26262 is the functional safety standard for road vehicles. Functional safety addresses safety-related functionality imple- mented in electronics and software. Mack has during 2018 initiated development of new vehicle functions and systems ac- cording to ISO 26262 after the standard became applicable to trucks, buses and trailers. Before ISO 26262, Mack followed other internal processes addressing functional safety. The truck will gradually be made compliant to ISO 26262. However, it will take several years until the complete truck is com- pliant to the standard. The status of the truck related to functional safety with regards to ISO 26262 will be described in this status. Continuous up- dates will be made to reflect the current status of the truck. The ASILs of the body builder interface characteristics will be documented and it will be described in which sense the interfa- ces meet the different ASILs. This section will also contain information on requirements and constraints for the usage of the body builder interface. In case-specific safety measures have to be applied by the body builder, this shall be stated in this section. When a body builder needs anything that is not described or when the ASIL of the characteristic is not according to the body builders expectations, the body builder shall contact Mack for guidance. This section is referenced from other body builder sections when applicable. Current status of the truck in relation to ISO 26262 The existing trucks are developed according to Mack internal processes addressing functional safety, applicable before ISO 26262. Presently no functions or systems in the trucks have been developed according to ISO 26262. Mack Body Builder Instructions MD USA151882123 Date 8.2020 Electrical Wiring and Connections Page 2 (36) All Rights Reserved Abbreviations • ACC Adaptive Cruise Control • BOC Back of Cab • CAN Controller Area Network • CDS Custom Defined Statement (replaced by DCL) • DCL DataMax Control Language • ECM Engine Control Module • EHT Electronic Hand Throttle • EMS Engine Management System • ESC Engine Speed Control • FMI Failure Mode Identification • GMT Greenwich Mean Time • MID Message Identifier (J1587 source) • PGN Parameter Group Number (J1939 message ID) • PID Parameter Identification (J1587) • PID Product Identification (order code) • PTO power take-off • PTT2 Premium Tech Tool 2 • SA Source Address (J1939 unit identifier) • SID Subsystem Identification (J1587) • SPN Suspect Parameter Number (J1939 parameter) • SSC Single Speed Control • TECU Transmission Electronic Control Unit • VDA Vehicle Data Administration (OEM database) • VECU Vehicle Electronic Control Unit Mack Body Builder Instructions MD USA151882123 Date 8.2020 Electrical Wiring and Connections Page 3 (36) All Rights Reserved General Wiring Definitions The general wiring definitions provide a standardized list of terminology used in running wires, hoses, and cables throughout the vehicle. Items capable of causing damage to the routed commodity in a rubbing condition during vehicle Abrasive Surface operation AWG American Wire Gauge Bundled With A number of items tied, wrapped, or otherwise held together A nylon plastic self-sizing strap, UV resistant, capable of bundling specified load(s) during vehicle Cable Tie operation Chafing To wear away by rubbing Contacts Items touching each other. Crimped A routed commodity that is bent or pressed into ridges Damaged An item that differs from its original condition Drooping Routed items hanging downward, which are detrimental to safe vehicle operation (Pertaining to the Compressor Discharge Line) A high point in the routing of the Compressor Dis- Dual Fall charge Line (located on the engine) whereby any collected moisture is allowed to fall in two different di- rections where it is either dissipated by heat or is purged High Current Wire sizes 13 mm sq. (0.5 inches sq.) (6 AWG) and larger Electrical Cables High Nut Extended clamp length Kinked A tight bend, curl, or twist in the routed commodity causing flow to be restricted Low Current Elec- Wire sizes 8 mm sq. (0.3-inches sq) (8 AWG) and smaller trical Cables Low Nut Standard clamp length Material Grade 30 Minimum yield strength of 30,000 psi Material Grade 50 Minimum yield strength of 50,000 psi Verb typically used in a statement of practice that is a permissive condition and carries no requirement May or recommendation. It can be included to alter statements of mandate or recommendation Not Secured Items not fastened, bundled or tied Plastic Conduit Corrugated or smooth wall tubing used to protect hoses, harnesses, cables, tubing, pipes, etc. Puncture Small hole or wound Routed With Items taking the same path but not attached to each other (i.e., parallel but separate) Rubbing Items that contact each other and have independent movement Verb typically used in a statement of required, mandatory or specifically prohibitive practice regarding Shall routing and clipping Sharp Edge A surface capable of cutting or piercing the routed commodity during vehicle operation Verb typically used in a statement of recommended, but not mandatory, practice in typical situations Should with deviations allowed if Engineering judgment or Engineering study indicates that the deviation is appropriate Mack Body Builder Instructions MD USA151882123 Date 8.2020 Electrical Wiring and Connections Page 4 (36) All Rights Reserved Twisted Distorted from the routed commodities’ original shape about it’s cross-sectional centerline Touch Items that contact each other but do not have relative movement Routing and Clipping Guidelines 1 Brackets used in routing and clipping should be Material Grade 50 or better to ensure sufficient clamp load when sharing joint connections with cross members or other structural members. This applies only to joint connections using a low nut. Brackets of Material Grade 30 are acceptable provided the shared joint is using a high nut. The area of the clip bracket under the bolt head must be a least as large as the bolt head itself. 2 Clips that scratch exterior mounting surfaces shall not be used (i.e., barbed/spring type) unless the material is non-corrod- ing (i.e., plastic). Clips must have rust protection. 3 Clip sizes should adequately secure the bundle without restricting flow, causing collapse, or preventing relative movement. 4 Bundles shall be supported at 24 inches (600 mm) maximum intervals. A cable tie should be used between clip points on bundles with the exception of electrical wiring harness. The electrical wiring harness can have a maximum support dis- tance of 18 inches (450 mm) and a cable tie on bundles between clip points. When air and electrical lines are bundled to- gether, the commodity with the greater cross-sectional area may determine the support spacing. A minimum of two cable ties shall be used between clip points to bundle electrical lines when the larger interval is used. W3104131 1 Support electrical cables every 18 inches (450 mm) Mack Body Builder Instructions MD USA151882123 Date 8.2020 Electrical Wiring and Connections Page 5 (36) All Rights Reserved Support Distances, Continued W3104144 1 Support cables near connectors every 4 inches (100 mm) 1 Electrical cables and wiring harnesses are to be secured 4 inches (100 mm) from the wire insertion end of the connector or clipped to the body. 2 Routing and clipping on purchased components (i.e., engine/transmission) should not include removing or replacing a bolt(s), nut(s) or screw(s) installed by the manufacturer. In such cases where this is unavoidable, the bolt(s), nut(s) or screw(s) shall be reinstalled to the manufacturer’s specifications. 3 Bundles should not contact sharp edges of cross members. Contact may occur if it is against a smooth surface, a smooth radiused edge or a coined edge and the bundle is secured to prevent independent movement. 4 Hoses, tubing, pipes and electrical conduits shall not rub each other but may touch. 5 The fabric braided portion of the compressor discharge hose is compatible to be bundled with all routed air lines. 6 The compressor discharge pipe shall be routed independent of all other routing. 7 Electric cables/harnesses must not be bundled with fuel or hydraulic lines. The electrical cables/harnesses may be routed parallel with fuel or hydraulic lines, however must remain separated by approved clipping materials. When design control is possible, electrical cables/harnesses will be routed above fuel or hydraulic lines. If fuel or hydraulic lines must route above circuit protected electrical cables /harnesses, the fuel or hydraulic lines will have no fittings or potential leak points above electrical cables/harnesses and shall be minimized to the shortest distance possible over low current electrical ca- bles/harnesses.
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